п»ї Repair and operation of the TOYOTA 4-RUNNER car - 5.10. System of electronic injection of fuel (EFI system)//Toyota 4ranner 1987-1998 /

Toyota 4 Runner/Hilux/Surf

1987-1998 of release

Repair and operation of the car



Toyota 4ranner
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Systems of heating, ventilation
- 5. Fuel and exhaust systems
   5.1. Specifications
   5.2. Order of a decompression of fuel system
   + 5.3. Fuel pump and pressure of fuel
   5.4. Hoses and connections
   5.5. Fuel tank
   5.6. Fuel pump
   5.7. Fuel level sensor
   5.8. Air filter
   5.9. Cable of a butterfly valve
   - 5.10. System of electronic injection of fuel (EFI system)
      5.10.1. Check of EFI system
   + 5.11. Units of system of injection of fuel
   5.12. Service of an exhaust system
   + 5.13. System of decrease in toxicity of exhaust gases
+ 6. Transmissions
+ 7. Transmission elements
+ 8. Brake system
+ 9. Suspension bracket and steering
+ 10. Body
+ 11. Electric equipment
+ 12. Electroschemes


ремонт информационных табло, ок в санкт-петербурге



5.10. System of electronic injection of fuel (EFI system)

GENERAL INFORMATION

Units of system of electronic injection of fuel of 4-cylinder engines

1. Zolotnik of ventilation of a case
2. Distributor of fuel and nozzle
3. Sensor of an angle of rotation of a butterfly valve
4. Recirculation sensor
5. Leveling chamber
6. Diagnostic socket
7. Assembly block
8. Pneumoshock-absorber
9. Fuel pressure regulator
10. Air filter
11. Stream speed sensor

Units of system of electronic injection of fuel of V6 3,4 engines of l

1. Air filter
2. Stream speed sensor
3. Sensor of an angle of rotation of a butterfly valve
4. Recirculation sensor
(under a leveling chamber)
5. Leveling chamber
6. Fuel pressure regulator
7. Diagnostic socket
8. Assembly block

Cars are equipped with system of electronic injection of fuel (EFI system) into which three subsystems enter:

  вЂ“ fuel system;
  вЂ“ system of an intake of air;
  вЂ“ electronic control system.

FUEL SYSTEM

The fuel pump located in a tank provides fuel supply under constant pressure in the distributor from which fuel is evenly distributed on nozzles. From the distributor fuel moves to inlet canals of cylinders through nozzles. The amount of injectable fuel is strictly controlled by the electronic control unit (ESM-block). The regulator of pressure of fuel provides change of pressure of fuel according to depression on the soaking-up collector.

SYSTEM OF THE INTAKE OF AIR

The system of an intake of air consists of the air filter, a chamber of a butterfly valve and the channel connecting these two units. The sensor of the air temperature (IAT sensor) traces temperature of the sucked-in air. The signal from the sensor arrives on the electronic control unit which provides a dosage of injectable fuel according to air temperature. A butterfly valve the driver operates. In process of opening of a butterfly valve the speed of the arriving air that leads to decrease of its temperature increases. The sensor registers change of air temperature and gives a signal on the ESM block which in turn gives a signal on nozzles.

ELECTRONIC CONTROL UNIT (ESM-BLOK)

Management of electronic injection of fuel and other systems is provided with the processor block. The microcomputer is a part of the block. On the control unit signals from a number of sensors which trace such parameters as air temperature on an entrance to cylinders, an angle of rotation of a butterfly valve, etc. arrive. On the basis of these data the control unit determines the fuel injection duration with which maintenance of an optimum ratio of gasoline and air in gas mixture is provided.